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Cheap flights from District of Columbia to Ko Samui from $1,045

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from District of Columbia to Ko Samui departing on 9/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Find the cheapest flights from District of Columbia to Ko Samui

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
3:10 pm - 10:30 am
IAD
-
USM
32h 20m
2 stops
Multiple Airlines Logo
3:50 pm - 9:45 am
USM
-
IAD
28h 55m
2 stops
$1,045Multiple Airlines
Wed, Sep 2 - Thu, Sep 17
Multiple Airlines Logo
3:10 pm - 10:30 am
IAD
-
USM
32h 20m
2 stops
Multiple Airlines Logo
2:30 pm - 9:45 am
USM
-
IAD
30h 15m
2 stops
$1,112Multiple Airlines
Mon, Aug 31 - Sat, Sep 19
Etihad Airways Logo
3:10 pm - 10:45 am
IAD
-
USM
32h 35m
2 stops
Etihad Airways Logo
5:55 pm - 9:45 am
USM
-
IAD
26h 50m
2 stops
$1,196Etihad Airways
Tue, Sep 1 - Wed, Sep 16
Etihad Airways Logo
3:10 pm - 7:30 am
IAD
-
USM
29h 20m
2 stops
Etihad Airways Logo
5:50 pm - 9:45 am
USM
-
IAD
26h 55m
2 stops
$1,215Etihad Airways
Sun, Aug 30 - Tue, Sep 15
Etihad Airways Logo
3:10 pm - 7:10 am
IAD
-
USM
29h 00m
2 stops
Etihad Airways Logo
5:55 pm - 9:45 am
USM
-
IAD
26h 50m
2 stops
$1,255Etihad Airways
Fri, Sep 4 - Thu, Sep 17
Turkish Airlines Logo
9:45 pm - 1:45 pm
IAD
-
USM
29h 00m
2 stops
Turkish Airlines Logo
6:25 pm - 11:35 am
USM
-
IAD
28h 10m
2 stops
$1,303Turkish Airlines
Mon, Sep 14 - Thu, Sep 17
Emirates Logo
10:55 am - 6:00 pm
IAD
-
USM
44h 05m
2 stops
Emirates Logo
8:00 am - 8:40 am
USM
-
IAD
35h 40m
2 stops
$1,409Emirates
Tue, May 5 - Sat, May 9
Emirates Logo
10:55 am - 4:30 pm
IAD
-
USM
42h 35m
2 stops
Emirates Logo
8:00 am - 8:40 am
USM
-
IAD
35h 40m
2 stops
$1,420Emirates
Mon, Sep 14 - Thu, Sep 17
Cathay Pacific Logo
10:15 am - 7:40 pm
DCA
-
USM
46h 25m
2 stops
Cathay Pacific Logo
11:55 am - 9:04 am
USM
-
DCA
56h 09m
2 stops
$1,774Cathay Pacific
Mon, Aug 31 - Sat, Sep 19
Cathay Pacific Logo
6:59 pm - 7:40 pm
DCA
-
USM
37h 41m
2 stops
Cathay Pacific Logo
11:55 am - 8:00 pm
USM
-
DCA
43h 05m
2 stops
$1,788Cathay Pacific
Wed, Sep 2 - Thu, Sep 17

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Emirates flights from District of Columbia to Ko Samui

Our best Emirates deals on District of Columbia to Ko Samui flight tickets
Emirates
May 5
IAD10:55 amWashington, D.C. Dulles Intl
44h 05m
2 stops
USM6:00 pmKo Samui
May 9
USM8:00 amKo Samui
35h 40m
2 stops
IAD8:40 amWashington, D.C. Dulles Intl
$1,409
Emirates
Sep 14
IAD10:55 amWashington, D.C. Dulles Intl
42h 35m
2 stops
USM4:30 pmKo Samui
Sep 17
USM8:00 amKo Samui
35h 40m
2 stops
IAD8:40 amWashington, D.C. Dulles Intl
$1,420

Turkish Airlines flights from District of Columbia to Ko Samui

Our best Turkish Airlines deals on District of Columbia to Ko Samui flight tickets
Turkish Airlines
Sep 14
IAD9:45 pmWashington, D.C. Dulles Intl
29h 00m
2 stops
USM1:45 pmKo Samui
Sep 17
USM6:25 pmKo Samui
28h 10m
2 stops
IAD11:35 amWashington, D.C. Dulles Intl
$1,303
Turkish Airlines
Jul 3
IAD9:45 pmWashington, D.C. Dulles Intl
33h 30m
2 stops
USM6:15 pmKo Samui
Jul 9
USM5:50 pmKo Samui
28h 45m
2 stops
IAD11:35 amWashington, D.C. Dulles Intl
$2,017
Turkish Airlines
Jul 3
IAD9:45 pmWashington, D.C. Dulles Intl
33h 30m
2 stops
USM6:15 pmKo Samui
Jul 13
USM1:30 pmKo Samui
33h 05m
2 stops
IAD11:35 amWashington, D.C. Dulles Intl
$2,130

momondo Fare Finder

 
Customize your flight search to find flights from District of Columbia to Ko Samui that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated April 17, 2026.
Use the filters below to find and compare flights from District of Columbia to Ko Samui that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Ko Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Wed 9/2

3:10 pm-10:30 am

2 stops32h 20m

Ko Samui

Thu 9/17

3:50 pm-9:45 am

2 stops28h 55m

$1,045

Washington, D.C.Ko Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Mon 8/31

3:10 pm-10:30 am

2 stops32h 20m

Ko Samui

Sat 9/19

2:30 pm-9:45 am

2 stops30h 15m

$1,112

Washington, D.C.Ko Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Tue 9/1

3:10 pm-10:45 am

2 stops32h 35m

Ko Samui

Wed 9/16

5:55 pm-9:45 am

2 stops26h 50m

$1,196

Washington, D.C.Ko Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Sun 8/30

3:10 pm-7:30 am

2 stops29h 20m

Ko Samui

Tue 9/15

5:50 pm-9:45 am

2 stops26h 55m

$1,215
Quickest round-trip

Washington, D.C.Ko Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Fri 9/4

3:10 pm-7:10 am

2 stops29h 00m

Ko Samui

Thu 9/17

5:55 pm-9:45 am

2 stops26h 50m

$1,255

Washington, D.C.Ko Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Mon 9/14

9:45 pm-1:45 pm

2 stops29h 00m

Ko Samui

Thu 9/17

6:25 pm-11:35 am

2 stops28h 10m

$1,303

Washington, D.C.Ko Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Tue 5/5

10:55 am-6:00 pm

2 stops44h 05m

Ko Samui

Sat 5/9

8:00 am-8:40 am

2 stops35h 40m

$1,409

Washington, D.C.Ko Samui

IAD - USM

IADUSM

Washington, D.C. Dulles Intl

Mon 9/14

10:55 am-4:30 pm

2 stops42h 35m

Ko Samui

Thu 9/17

8:00 am-8:40 am

2 stops35h 40m

$1,420

Washington, D.C.Ko Samui

DCA - USM

DCAUSM

Washington, D.C. Reagan-National

Mon 8/31

10:15 am-7:40 pm

2 stops46h 25m

Ko Samui

Sat 9/19

11:55 am-9:04 am

2 stops56h 09m

$1,774

Washington, D.C.Ko Samui

DCA - USM

DCAUSM

Washington, D.C. Reagan-National

Wed 9/2

6:59 pm-7:40 pm

2 stops37h 41m

Ko Samui

Thu 9/17

11:55 am-8:00 pm

2 stops43h 05m

$1,788

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

Cheap District of Columbia to Ko Samui flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from District of Columbia to Ko Samui

Fastest flight time

25h 30m

Direct flights

None
The fastest flight from District of Columbia to Ko Samui takes 25h 30m
There are no direct flights from District of Columbia to Ko Samui. There are no popular flight routes from District of Columbia to Ko Samui.
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Frequently asked questions about flying from District of Columbia to Ko Samui

  • When did momondo last update prices for flights from District of Columbia to Ko Samui Airport?

    Prices for flights from District of Columbia to Ko Samui Airport refresh daily.

  • How old do you have to be to fly from District of Columbia to Ko Samui Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from District of Columbia to Ko Samui Airport.

  • What documentation or ID do you need to fly to Ko Samui Airport?

    The travel and health documents required for your trip to Ko Samui Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Ko Samui Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Frequently asked questions about flying from District of Columbia to Ko Samui

  • How do I get Price Alerts for flights from District of Columbia to Ko Samui?

    You can take advantage of momondo’s Price Alerts by first searching for your flights to District of Columbia from Ko Samui. Flight offers will be shown to you in real-time. From there you can create a Price Alert by using our on-site widget.

  • How can I save money on flights from District of Columbia to Ko Samui with momondo?

    Leverage our AI within our “Price Forecast” tool, which predicts if it’s better to book now or wait until prices decrease. You can strategically pick the best days to fly and save money on your trip by using our “Price Calendar” tool. “Explore” shows an overview of how much it costs to fly to anywhere from a selected city or airport. Our “Discover” content is a great option for travel inspiration and money-saving tips, while “Price Alerts” will update you when prices change, so you can book when fares are right.

  • How does momondo find its flight prices?

    We show prices from over 700+ competitors with a single click. With options from airlines and OTAs from across our 30 international markets, we are able to show you a diverse range of deals to create your adventure.

Traveling to a place near Ko Samui?

Book flights to Ko Samui if you plan to visit one of these locations
Ko Pha Ngan
Ko Tao
Khanom

Why use momondo?

Why should I use momondo to find a flight deal from District of Columbia to Ko Samui?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from District of Columbia to Ko Samui. momondo saves you time and could save you money on your trip.

Can I find flights from District of Columbia to Ko Samui with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Ko Samui from District of Columbia with this policy.

How can momondo help me find flights from District of Columbia to Ko Samui?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Ko Samui from District of Columbia.

I’m not ready to book a flight from District of Columbia to Ko Samui right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of District of Columbia to Ko Samui flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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